Generating Negative Impedance Compensation
AssigneeInternational Business Machines Corporation
InventorsRAJESH CHEERANTHODI, JOHN F. EWEN, SANTHOSH MADHAVAN, GIRI N.K. RANGAN, UMESH K. SHUKLA, SARABJEET SINGH
Life of this patent
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Abstract
Apparatuses for generating negative impedance compensation are provided. Embodiments include a differential amplifier having a first output and a second output; a capacitor coupled between the first output and the second output of the differential amplifier; a first negative impedance cross-coupled circuit having a first output and a second output; and a resistance control circuit coupled in series between the first output and the second output of the differential amplifier and the first output and the second output of the first negative impedance cross-coupled circuit.
Claims19
An apparatus for generating negative impedance compensation, the apparatus comprising:
- a differential amplifier having a first output and a second output;
- a capacitor coupled between the first output and the second output of the differential amplifier;
- a first negative impedance cross-coupled circuit having a first output and a second output;
- and
- a resistance control circuit coupled in series between the first output and the second output of the differential amplifier and the first output and the second output of the first negative impedance cross-coupled circuit.
An apparatus for generating negative impedance compensation, the apparatus comprising:
- a differential amplifier having a first output and a second output;
- a capacitor coupled between the first output and the second output of the differential amplifier. a first negative impedance cross-coupled circuit having a first output and a second output;
- a second negative impedance cross-coupled circuit having a first output and a second output;
- a first transistor, a source terminal of the first transistor coupled to a second output of the first negative impedance cross-coupled circuit and a drain terminal of the first transistor coupled to a gate terminal of the first transistor;
- and
- a second transistor, a source terminal of the second transistor coupled to a first output of the second negative impedance cross-coupled circuit and a drain terminal of the second transistor coupled to a gate terminal of the second transistor.
An apparatus for generating negative impedance compensation, the apparatus comprising:
- a first transistor and a second transistor;
- a drain terminal of the first transistor coupled to a gate terminal of the second transistor and a gate terminal of the first transistor coupled to a drain terminal of the second transistor;
- and
- a third transistor and a fourth transistor;
- a drain terminal of the third transistor coupled to the gate terminal of the first transistor and a drain terminal of the fourth transistor coupled to a gate terminal of the second transistor.
Dependencies are inferred from the claim text.